[Intel-gfx] [PATCH 07/39] drm/i915: Report the number of closed vma held by each context in debugfs
Mika Kuoppala
mika.kuoppala at linux.intel.com
Fri Jan 4 13:54:21 UTC 2019
Chris Wilson <chris at chris-wilson.co.uk> writes:
> Include the total size of closed vma when reporting the per_ctx_stats of
> debugfs/i915_gem_objects.
>
> Whilst adjusting the context tracking, note that we can simply use our
> list of contexts in i915->contexts rather than circumlocute via
> dev->filelist and the per-file context idr, with the result that we can
> show objects allocated to different vm (i.e. contexts within a file).
>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 124 +++++++++++-----------------
> 1 file changed, 47 insertions(+), 77 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index b89abbba4604..c2f56c1c8199 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -297,11 +297,12 @@ static int i915_gem_stolen_list_info(struct seq_file *m, void *data)
> }
>
> struct file_stats {
> - struct drm_i915_file_private *file_priv;
> + struct i915_address_space *vm;
> unsigned long count;
> u64 total, unbound;
> u64 global, shared;
> u64 active, inactive;
> + u64 closed;
> };
>
> static int per_file_stats(int id, void *ptr, void *data)
> @@ -326,9 +327,7 @@ static int per_file_stats(int id, void *ptr, void *data)
> if (i915_vma_is_ggtt(vma)) {
> stats->global += vma->node.size;
> } else {
> - struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vma->vm);
> -
> - if (ppgtt->vm.file != stats->file_priv)
> + if (vma->vm != stats->vm)
> continue;
> }
>
> @@ -336,6 +335,9 @@ static int per_file_stats(int id, void *ptr, void *data)
> stats->active += vma->node.size;
> else
> stats->inactive += vma->node.size;
> +
> + if (i915_vma_is_closed(vma))
> + stats->closed += vma->node.size;
> }
>
> return 0;
> @@ -343,7 +345,7 @@ static int per_file_stats(int id, void *ptr, void *data)
>
> #define print_file_stats(m, name, stats) do { \
> if (stats.count) \
> - seq_printf(m, "%s: %lu objects, %llu bytes (%llu active, %llu inactive, %llu global, %llu shared, %llu unbound)\n", \
> + seq_printf(m, "%s: %lu objects, %llu bytes (%llu active, %llu inactive, %llu global, %llu shared, %llu unbound, %llu closed)\n", \
> name, \
> stats.count, \
> stats.total, \
> @@ -351,20 +353,19 @@ static int per_file_stats(int id, void *ptr, void *data)
> stats.inactive, \
> stats.global, \
> stats.shared, \
> - stats.unbound); \
> + stats.unbound, \
> + stats.closed); \
> } while (0)
>
> static void print_batch_pool_stats(struct seq_file *m,
> struct drm_i915_private *dev_priv)
> {
> struct drm_i915_gem_object *obj;
> - struct file_stats stats;
> struct intel_engine_cs *engine;
> + struct file_stats stats = {};
> enum intel_engine_id id;
> int j;
>
> - memset(&stats, 0, sizeof(stats));
> -
> for_each_engine(engine, dev_priv, id) {
> for (j = 0; j < ARRAY_SIZE(engine->batch_pool.cache_list); j++) {
> list_for_each_entry(obj,
> @@ -377,44 +378,47 @@ static void print_batch_pool_stats(struct seq_file *m,
> print_file_stats(m, "[k]batch pool", stats);
> }
>
> -static int per_file_ctx_stats(int idx, void *ptr, void *data)
> +static void print_context_stats(struct seq_file *m,
> + struct drm_i915_private *i915)
> {
> - struct i915_gem_context *ctx = ptr;
> - struct intel_engine_cs *engine;
> - enum intel_engine_id id;
> + struct file_stats kstats = {};
> + struct i915_gem_context *ctx;
>
> - for_each_engine(engine, ctx->i915, id) {
> - struct intel_context *ce = to_intel_context(ctx, engine);
> + list_for_each_entry(ctx, &i915->contexts.list, link) {
> + struct intel_engine_cs *engine;
> + enum intel_engine_id id;
>
> - if (ce->state)
> - per_file_stats(0, ce->state->obj, data);
> - if (ce->ring)
> - per_file_stats(0, ce->ring->vma->obj, data);
> - }
> + for_each_engine(engine, i915, id) {
> + struct intel_context *ce = to_intel_context(ctx, engine);
>
> - return 0;
> -}
> + if (ce->state)
> + per_file_stats(0, ce->state->obj, &kstats);
> + if (ce->ring)
> + per_file_stats(0, ce->ring->vma->obj, &kstats);
> + }
>
> -static void print_context_stats(struct seq_file *m,
> - struct drm_i915_private *dev_priv)
> -{
> - struct drm_device *dev = &dev_priv->drm;
> - struct file_stats stats;
> - struct drm_file *file;
> + if (!IS_ERR_OR_NULL(ctx->file_priv)) {
> + struct file_stats stats = { .vm = &ctx->ppgtt->vm, };
> + struct drm_file *file = ctx->file_priv->file;
> + struct task_struct *task;
> + char name[80];
>
> - memset(&stats, 0, sizeof(stats));
> + spin_lock(&file->table_lock);
> + idr_for_each(&file->object_idr, per_file_stats, &stats);
> + spin_unlock(&file->table_lock);
>
> - mutex_lock(&dev->struct_mutex);
> - if (dev_priv->kernel_context)
> - per_file_ctx_stats(0, dev_priv->kernel_context, &stats);
> + rcu_read_lock();
> + task = pid_task(ctx->pid ?: file->pid, PIDTYPE_PID);
> + snprintf(name, sizeof(name), "%s/%d",
> + task ? task->comm : "<unknown>",
> + ctx->user_handle);
> + rcu_read_unlock();
You removed the comment but... the pattern to protect
task->comm is rather well established so I dont mind.
Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
>
> - list_for_each_entry(file, &dev->filelist, lhead) {
> - struct drm_i915_file_private *fpriv = file->driver_priv;
> - idr_for_each(&fpriv->context_idr, per_file_ctx_stats, &stats);
> + print_file_stats(m, name, stats);
> + }
> }
> - mutex_unlock(&dev->struct_mutex);
>
> - print_file_stats(m, "[k]contexts", stats);
> + print_file_stats(m, "[k]contexts", kstats);
> }
>
> static int i915_gem_object_info(struct seq_file *m, void *data)
> @@ -426,14 +430,9 @@ static int i915_gem_object_info(struct seq_file *m, void *data)
> u64 size, mapped_size, purgeable_size, dpy_size, huge_size;
> struct drm_i915_gem_object *obj;
> unsigned int page_sizes = 0;
> - struct drm_file *file;
> char buf[80];
> int ret;
>
> - ret = mutex_lock_interruptible(&dev->struct_mutex);
> - if (ret)
> - return ret;
> -
> seq_printf(m, "%u objects, %llu bytes\n",
> dev_priv->mm.object_count,
> dev_priv->mm.object_memory);
> @@ -514,43 +513,14 @@ static int i915_gem_object_info(struct seq_file *m, void *data)
> buf, sizeof(buf)));
>
> seq_putc(m, '\n');
> - print_batch_pool_stats(m, dev_priv);
> - mutex_unlock(&dev->struct_mutex);
> -
> - mutex_lock(&dev->filelist_mutex);
> - print_context_stats(m, dev_priv);
> - list_for_each_entry_reverse(file, &dev->filelist, lhead) {
> - struct file_stats stats;
> - struct drm_i915_file_private *file_priv = file->driver_priv;
> - struct i915_request *request;
> - struct task_struct *task;
> -
> - mutex_lock(&dev->struct_mutex);
>
> - memset(&stats, 0, sizeof(stats));
> - stats.file_priv = file->driver_priv;
> - spin_lock(&file->table_lock);
> - idr_for_each(&file->object_idr, per_file_stats, &stats);
> - spin_unlock(&file->table_lock);
> - /*
> - * Although we have a valid reference on file->pid, that does
> - * not guarantee that the task_struct who called get_pid() is
> - * still alive (e.g. get_pid(current) => fork() => exit()).
> - * Therefore, we need to protect this ->comm access using RCU.
> - */
> - request = list_first_entry_or_null(&file_priv->mm.request_list,
> - struct i915_request,
> - client_link);
> - rcu_read_lock();
> - task = pid_task(request && request->gem_context->pid ?
> - request->gem_context->pid : file->pid,
> - PIDTYPE_PID);
> - print_file_stats(m, task ? task->comm : "<unknown>", stats);
> - rcu_read_unlock();
> + ret = mutex_lock_interruptible(&dev->struct_mutex);
> + if (ret)
> + return ret;
>
> - mutex_unlock(&dev->struct_mutex);
> - }
> - mutex_unlock(&dev->filelist_mutex);
> + print_batch_pool_stats(m, dev_priv);
> + print_context_stats(m, dev_priv);
> + mutex_unlock(&dev->struct_mutex);
>
> return 0;
> }
> --
> 2.20.1
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